WO2018232778A1

WO2018232778A1 - Pixel electrode and array substrate

Info

Publication number: WO2018232778A1
Application number: PCT/CN2017/091060
Authority: WO
Inventors: 孟小龙
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2017-06-19
Filing date: 2017-06-30
Publication date: 2018-12-27
Also published as: CN107121851B; CN107121851A

Abstract

A pixel electrode, comprising a keel electrode (1) dividing the pixel electrode into at least two electrode areas, wherein a plurality of strip-shaped branch electrodes (2) are arranged in each electrode area, one of two ends of each branch electrode (2) is connected to the keel electrode (1), the branch electrodes (2) in each electrode area extend in the same direction and are arranged in parallel, at least one connecting electrode (3) is arranged in each electrode area, and the connecting electrode (3) is connected to at least two branch electrodes (2). Further provided is an array substrate, comprising a pixel electrode. Compared with the prior art, with the enhancement of an alignment voltage, liquid crystals at the periphery of the pixel electrode and near the keel electrode (1) can be deflected in order by means of a common electrode, so that liquid crystals at the periphery of the connecting electrode (3) are extruded, then, liquid crystals, at the connecting electrode (3), in the pixel electrode are driven to deflect in order, and finally the state of complete segmentation in each direction is achieved, thereby avoiding the phenomenon of disordered domains, and effectively increasing the penetration rate.

Description

Pixel electrode and array substrate

Technical field

The invention relates to a liquid crystal display panel technology, in particular to a pixel electrode and an array substrate.

Background technique

Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, no radiation, etc., such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or Laptop screens, etc., dominate the field of flat panel display.

Active Thin Film Transistor-LCD (TFT-LCD) is the most common liquid crystal display in the mainstream market. According to different LCD driving methods, it can be roughly divided into: Twisted Nematic (TN) or Super Twisted Nematic (STN) type, In-Plane Switching (IPS) type, and Vertical Alignment (VA) type. Among them, the VA type liquid crystal display has a very high contrast ratio with respect to other types of liquid crystal displays, and has a very wide application in a large-sized display such as a television. The High Vertical Alignment (HVA) type is an important branch of the VA mode.

Generally, a liquid crystal display device includes a housing, a liquid crystal panel disposed in the housing, and a backlight module disposed in the housing. The structure of the liquid crystal panel is mainly composed of a Thin Film Transistor Array Substrate (TFT Array Substrate), a Color Filter Substrate (CF Substrate), and a liquid crystal layer disposed between the two substrates (Liquid). The crystal layer is constructed by controlling the rotation of the liquid crystal molecules of the liquid crystal layer by applying a driving voltage to the pixel electrodes of the TFT substrate and the common electrode of the CF substrate, and refracting the light of the backlight module to generate a picture. .

When the alignment is performed, the voltage is abnormal due to the connection between the respective pixel electrodes, causing the liquid crystal light to be aligned abnormally. At the beginning of the electric field, when the voltage rises to about 2.0V, a domain segmentation "vortex" appears in the middle of the pixel electrode (as shown in Figure 1). Normally, it will slowly diffuse to the entire pixel electrode, but due to the array substrate. The pixel electrodes are connected. When there is an electric field at the boundary around the pixel electrode, and there is no significant difference in the strength of the electric field, a domain segmentation "vortex" may also occur at the junction, and the domain segmentation may be affected and cannot be completed, resulting in disorder of the alignment ( The phenomenon of vortex).

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a pixel electrode and an array substrate to solve the chaotic domain phenomenon, thereby improving the transmittance.

The invention provides a pixel electrode, comprising a keel electrode dividing the pixel electrode into at least two electrode regions, wherein each electrode region is provided with a plurality of strip-shaped branch electrodes, one end of the branch electrodes and one end of the keel electrode Connected, the branch electrodes in each electrode region extend in the same direction and are arranged in parallel, and at least one connection electrode is provided in each electrode region, and the connection electrode is connected to at least two branch electrodes.

Further, the branch electrodes in the adjacent two electrode regions extend in different directions.

Further, the keel electrode is provided with two, which are arranged in a crisscross shape.

Further, a rectangular bezel electrode is further included. The keel electrode, the branch electrode and the connection electrode are disposed in the frame electrode, the two ends of the keel electrode are connected to the frame electrode, and the other end of the branch electrode is connected to the frame electrode.

Further, the closest distance between the connecting electrode and the keel electrode is greater than or equal to 15 um.

Further, the connecting electrode has a length and a width of 2 to 10 um.

Further, the width of the keel electrode is greater than 3 um.

Further, one connection electrode is provided in each electrode region, and the connection electrode is connected to three or more branch electrodes.

Further, two or more connection electrodes are provided in each electrode region.

The invention also provides an array substrate comprising the pixel electrode.

Compared with the prior art, the present invention divides a pixel electrode into at least two electrode regions, and at least one connecting electrode is disposed in each electrode region, and the connecting electrode is connected to at least two branch electrodes to start voltage application at the alignment. When there is a slight disorder in the connection electrode, as the alignment voltage is strengthened, the liquid crystal is squeezed around the periphery of the pixel electrode and the keel electrode by the common electrode, so that the liquid crystal around the connection electrode is squeezed, thereby driving the pixel. The liquid crystal at the connection electrode in the electrode is deflected in an orderly manner, and finally reaches a state of being completely divided in each direction, thereby avoiding disordered domains and effectively improving penetration. rate.

DRAWINGS

1 is a schematic view showing a domain division "vortex" occurring in a pixel electrode in the prior art;

2 is a schematic structural view of a pixel electrode according to Embodiment 1 of the present invention;

3 is a schematic structural view of a pixel electrode according to Embodiment 2 of the present invention;

4 is a schematic structural diagram of a pixel electrode according to Embodiment 3 of the present invention;

5 is a schematic structural diagram of a pixel electrode according to Embodiment 4 of the present invention;

6 is a schematic structural diagram of a pixel electrode according to Embodiment 5 of the present invention;

7 is a schematic structural view of a pixel electrode according to a sixth embodiment of the present invention;

Figure 8 is a schematic illustration of liquid crystal deflection in the alignment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 2, each of the pixel electrodes is surrounded by a common electrode, and the pixel electrode includes a keel electrode 1 that divides the pixel electrode into at least two electrode regions, and each of the electrode regions is provided with a plurality of strip-shaped branch electrodes 2, One end of both ends of the branch electrode 2 is connected to the keel electrode 1, and the branch electrodes 2 in each electrode region extend in the same direction and are arranged in parallel, and at least one connection electrode 3 is provided in each electrode region, the connection The electrode 3 is connected to at least two branch electrodes 2; the branch electrodes 2 in the adjacent two electrode regions have different extending directions; specifically, the keel electrode 1 is provided with two cross-shaped staggered electrodes, thereby dividing the pixel electrode into The four electrode regions are the first electrode region 11, the second electrode region 12, the third electrode region 13, and the fourth electrode region 14, respectively, and the branch electrodes 2 in the first electrode region 11 and the third electrode region 13 are parallel And the branch electrode 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

The pixel electrode of the present invention may further include a rectangular frame electrode 4, the keel electrode 1, the branch electrode 2 and the connection electrode 3 are disposed in the frame electrode 4, and both ends of the keel electrode 1 are connected to the frame electrode 4, and are divided into The other end of the branch electrode 2 is connected to the bezel electrode 4.

In the present invention, the closest distance between the connection electrode 3 and the keel electrode 1 is greater than or equal to 15 um; the length and width of the connection electrode 3 are 2 to 10 um; and the width of the keel electrode 1 is greater than 3 um.

As shown in FIG. 2 and FIG. 8, when the voltage is applied to the alignment, a slight disorder occurs at the position where the electrode 3 is connected. As the alignment voltage is strengthened, the periphery of the pixel electrode and the vicinity of the keel electrode 1 are made by the common electrode 5. The liquid crystal (LC) is deflected in an orderly manner, so that the liquid crystal at the periphery of the connection electrode 3 is pressed to form a uniform deflection direction, thereby completing the alignment at the connection electrode 3, thereby avoiding disordered domains, thereby improving the transmittance of the pixel electrode.

As shown in FIG. 2, which is a schematic structural diagram of Embodiment 1 of the present invention, a pixel electrode is disposed in a common electrode, and a pixel electrode of Embodiment 1 includes two keel electrodes 1 arranged in a crisscross shape, and a keel electrode 1 is a pixel electrode. Divided into four electrode regions, a plurality of strip-shaped branch electrodes 2 are disposed in each electrode region, and one end of both ends of the branch electrode 2 is connected to the keel electrode 1, and the branch electrodes 2 in each electrode region face the same The direction is extended and arranged in parallel, the distance between the periphery of the pixel electrode and the periphery of the common electrode 5 is equal, and one connection electrode 3 is provided in each electrode region, and the connection electrode 3 is connected to the two branch electrodes 2, two The branch electrodes 2 are disposed adjacently; the branch electrodes 2 in the adjacent two electrode regions have different extending directions; the connecting electrodes 3 are disposed in the middle of the electrode regions; specifically, the first electrode regions 11 and the third electrode regions 13 The branch electrodes 2 in the middle are parallel, and the branch electrodes 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

As shown in FIG. 3, which is a schematic structural view of Embodiment 2 of the present invention, a pixel electrode is disposed in a common electrode, and a pixel electrode of Embodiment 1 includes two keel electrodes 1 arranged in a crisscross shape, and a keel electrode 1 is a pixel electrode. Divided into four electrode regions, a plurality of strip-shaped branch electrodes 2 are disposed in each electrode region, and one end of both ends of the branch electrode 2 is connected to the keel electrode 1, and the branch electrodes 2 in each electrode region face the same The direction is extended and arranged in parallel, the distance between the periphery of the pixel electrode and the periphery of the common electrode 5 is equal, and one connection electrode 3 is provided in each electrode region, the connection electrode 3 is square, and the connection electrode 3 and the four branch electrodes are 2 connected; the branch electrodes 2 in the adjacent two electrode regions have different extending directions; the connecting electrode 3 is disposed in the middle of the electrode region; specifically, the branch electrodes 2 in the first electrode region 11 and the third electrode region 13 Parallel, and the branch electrodes 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

As shown in FIG. 4, it is a schematic structural diagram of Embodiment 3 of the present invention, in which a pixel electrode is disposed in a common electrode. The pixel electrode of Embodiment 1 includes two keel electrodes 1 and a frame electrode 4 which are arranged in a crisscross shape. The keel electrode 1 is disposed in the frame electrode 4, and the keel electrode 1 divides the pixel electrode into four electrode regions to form a field. a plurality of strip-shaped branch electrodes 2 are provided in each electrode region, one end of each of the branch electrodes 2 is connected to the keel electrode 1, and the branch electrodes 2 in each electrode region extend in the same direction and are parallel It is provided that the distance between the periphery of the bezel electrode 4 and the periphery of the common electrode 5 is equal, and one connection electrode 3 is provided in each electrode region, and the connection electrode 3 is connected to the two branch electrodes 2, and the two branch electrodes 2 are connected. Adjacent arrangement; the branch electrodes 2 in the adjacent two electrode regions have different extending directions; the connecting electrode 3 is disposed in the middle of the electrode region; specifically, the branch electrodes 2 in the first electrode region 11 and the third electrode region 13 Parallel, and the branch electrodes 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

As shown in FIG. 5, which is a schematic structural diagram of Embodiment 4 of the present invention, a pixel electrode is disposed in a common electrode, and a pixel electrode of Embodiment 1 includes two keel electrodes 1 arranged in a crisscross shape and a bezel electrode 4, the keel The electrode 1 is disposed in the frame electrode 4, and the keel electrode 1 divides the pixel electrode into four electrode regions to form a square shape, and a plurality of strip-shaped branch electrodes 2 are disposed in each electrode region, and both ends of the branch electrode 2 are One end is connected to the keel electrode 1, and the branch electrodes 2 in each electrode region extend in the same direction and are arranged in parallel, the distance between the periphery of the pixel electrode and the periphery of the common electrode 5 is equal, and one electrode is provided in each electrode region. Connecting the electrodes 3, the connecting electrodes 3 are square, the connecting electrodes 3 are connected to the four branch electrodes 2; the extending directions of the branch electrodes 2 in the adjacent two electrode regions are different; the connecting electrodes 3 are disposed in the middle of the electrode regions; specifically The branch electrodes 2 in the first electrode region 11 and the third electrode region 13 are parallel, and the branch electrodes 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

As shown in FIG. 6 , which is a schematic structural diagram of Embodiment 5 of the present invention, a pixel electrode is disposed in a common electrode, and a pixel electrode of Embodiment 1 includes two keel electrodes 1 arranged in a crisscross shape and a frame electrode 4, the keel The electrode 1 is disposed in the frame electrode 4, and the keel electrode 1 divides the pixel electrode into four electrode regions to form a square shape, and a plurality of strip-shaped branch electrodes 2 are disposed in each electrode region, and both ends of the branch electrode 2 are One end of the electrode is connected to the keel electrode 1, and the branch electrodes 2 in each electrode region extend in the same direction and are arranged in parallel. The distance between the periphery of the bezel electrode 4 and the periphery of the common electrode 5 is equal, and is provided in each electrode region. a plurality of connection electrodes 3, the connection electrodes 3 are connected to the two branch electrodes 2, and the two branch electrodes 2 are adjacently disposed; the branch electrodes 2 in the adjacent two electrode regions extend in different directions; the connection electrodes 3 are distributed on the electrodes In the region; specifically, the first electrode region 11 and the third The branch electrodes 2 in the electrode region 13 are parallel, and the branch electrodes 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

As shown in FIG. 7 , which is a schematic structural diagram of Embodiment 6 of the present invention, the pixel electrode is disposed in the common electrode, and the pixel electrode of Embodiment 1 includes two keel electrodes 1 arranged in a crisscross shape, and the keel electrode 1 divides the pixel electrode. The four electrode regions are formed in a square shape, and a plurality of strip-shaped branch electrodes 2 are disposed in each of the electrode regions, and one end of the two ends of the branch electrodes 2 is connected to the keel electrode 1, and the branch electrodes in each electrode region 2 extending in the same direction and arranged in parallel, the distance between the periphery of the pixel electrode and the periphery of the common electrode 5 is equal, and a plurality of connection electrodes 3 are provided in each electrode region, and the connection electrode 3 and the two branch electrodes 2 are provided Connected; two branch electrodes 2 are adjacently disposed, and the branch electrodes 2 in the adjacent two electrode regions have different extending directions; the connecting electrodes 3 are distributed in the electrode regions; specifically, the first electrode regions 11 and the third The branch electrodes 2 in the electrode region 13 are parallel, and the branch electrodes 2 in the second electrode region 12 and the fourth electrode region 14 are parallel.

In the embodiments 5 and 6, a plurality of connection electrodes 3 are disposed between the adjacent two branch electrodes 2, which are not specifically limited herein, and may be selected according to actual needs.

The present invention also discloses an array substrate, including the above pixel electrode, which will not be described herein.

While the invention has been shown and described with respect to the specific embodiments the embodiments of the embodiments of the invention Various changes in details.

Claims

A pixel electrode, comprising: a keel electrode dividing the pixel electrode into at least two electrode regions, wherein each electrode region is provided with a plurality of strip-shaped branch electrodes, and one end of the two ends of the branch electrodes is connected to the keel electrode, The branch electrodes in each electrode region extend in the same direction and are arranged in parallel, and at least one connection electrode is provided in each electrode region, and the connection electrode is connected to at least two branch electrodes.
The pixel electrode according to claim 1, wherein the branch electrodes in the adjacent two electrode regions extend in different directions.
The pixel electrode according to claim 1, wherein said keel electrode is provided with two, which are arranged in a crisscross shape.
The pixel electrode according to claim 1, further comprising a rectangular frame electrode, wherein the keel electrode, the branch electrode and the connection electrode are disposed in the frame electrode, and both ends of the keel electrode are connected to the frame electrode, and the other end of the branch electrode Connected to the bezel electrode.
The pixel electrode according to claim 2, further comprising a rectangular frame electrode, wherein the keel electrode, the branch electrode and the connection electrode are disposed in the frame electrode, the two ends of the keel electrode are connected to the frame electrode, and the other end of the branch electrode Connected to the bezel electrode.
The pixel electrode according to claim 3, further comprising a rectangular frame electrode, wherein the keel electrode, the branch electrode and the connection electrode are disposed in the frame electrode, the two ends of the keel electrode are connected to the frame electrode, and the other end of the branch electrode Connected to the bezel electrode.
The pixel electrode according to claim 1, wherein: the closest distance of the connection electrode to the keel electrode is greater than or equal to 15 um.
The pixel electrode according to claim 1, wherein said connecting electrode has a length and a width of 2 to 10 um.
The pixel electrode of claim 1 wherein: the keel electrode has a width greater than 3 um.
The pixel electrode according to claim 1, wherein one of the connection electrodes in each electrode region is provided, and the connection electrode is connected to three or more branch electrodes.
The pixel electrode according to claim 1, wherein two or more of the connection electrodes in each of the electrode regions are provided.
An array substrate, comprising: a pixel electrode, the pixel electrode comprising a keel electrode dividing the pixel electrode into at least two electrode regions, wherein each electrode region is provided with a plurality of strip-shaped branch electrodes, and two ends of the branch electrodes One end is connected to the keel electrode, and the branch electrodes in each electrode region extend in the same direction and are arranged in parallel, and at least one connection electrode is provided in each electrode region, and the connection electrode is connected to at least two branch electrodes.
The array substrate according to claim 12, wherein the branch electrodes in the adjacent two electrode regions extend in different directions.
The array substrate according to claim 12, wherein: the keel electrode is provided with two, which are arranged in a crisscross shape.
The array substrate according to claim 12, further comprising a rectangular frame electrode, wherein the keel electrode, the branch electrode and the connection electrode are disposed in the frame electrode, the two ends of the keel electrode are connected to the frame electrode, and the other end of the branch electrode Connected to the bezel electrode.
The array substrate according to claim 1, wherein a closest distance of the connection electrode to the keel electrode is greater than or equal to 15 um.
The array substrate according to claim 1, wherein the connecting electrode has a length and a width of 2 to 10 um.
The array substrate of claim 1 wherein: the keel electrode has a width greater than 3 um.
The array substrate according to claim 1, wherein one of the connection electrodes in each electrode region is provided, and the connection electrode is connected to three or more branch electrodes.
The array substrate according to claim 1, wherein two or more connection electrodes are provided in each electrode region.